patience guy. 
Lets have an example. Suppose you are on a journey with 10 stops.
A car accelerating at constant 2.5k rpm will reach cruising speed, eg 80km/h, around 5 seconds faster than a car accelerating at constant 2k rpm.
5 seconds per stop, 5sec x 10stops = 50sec per journey.
Would you mind arriving at your destination a minute later? Yes, there are other reasons for wanting to accelerate faster, but this is just a simple example of how reving off at the start line doesn't really make a difference for your journey time.